<< Click to Display Table of Contents >> Navigation: MotionDesigner Reference & User Interface > SEGMENT EDITOR > Segment Editor: SegmentRange 
Not all motionlaws have a SegmentRange.
SegmentRange parameters clip (remove) the start or end, or both, of the mathematicalfunction that defines the motionlaw.
SegmentRange does NOT change the SegmentWidth
Start and End Segment Ranges 
Segment Ranges  available with many, but not all Traditional MotionLaws. The parameters are: •StartRange [Default = 0] •EndRange [Default = 1] 0 ≤ Start Range < End Range ≤ 1 

Notes: •Position at the start and end of the segment do not NOT change. 

The images shows the acceleration graph of a Modified Sinusoid motionlaw. The Xaxis start is 30º and Xaxis end is 120º Image 1 Default SegmentRange parameter values. •StartRange = 0.0 •EndRange = 1.0 

Image 2 •StartRange = 0.2  to removes 20% at the start of the ModifiedSinusoid segment mathematically function •EndRange = 1.0 SegmentWidth does not change. 

Image 3 •StartRange = 0.0 •EndRange = 0.8  to remove 20% at the end of the ModifiedSinusoid segment. SegmentWidth does not change. 

see also: Segment Editor: SegmentWidth, Segment Editor: Parameters 
Symmetrical Motions The crossover is at the midpoint of the Segment. Asymmetrical Motions The crossover is earlier or later than the midpoint of the Segment. When to use Asymmetrical Motions You want the mechanism tool to accelerate quickly, to reach its maximum velocity earlier than the midpoint (natural) of the motionlaw. The tool will decelerate slowly for more than 50% of the segment period. and its than the standard deceleration duration. Or viceversa. 

You can model an asymmetrical motion with two segments that have the same motion law  for example a Modified Sinusoid. Orange Line graph :Symmetrical ModSine MotionLaw : λ = 0.5 This motionlaw is usually specified with one standard ModSine segment. However, here, it has two ModSine segments. Segment 1 Machine angle: 0  180º [ 0  0.5 of total duration] Displacement : 0  50 units Segment Ranges = 0 and 0.5. Segment 2 Machine angle: 180  360º [ 0.5  1.0 of total duration] Displacement : 50 100 units Segment Ranges = 0.5 and 1. Black Line graphAsymmetrical ModSine MotionLaw : λ = 0.25 Crossover @ 0.25 = 90º machine angle. It also two ModSine segments: Segment 1: Machine angle: 0  90º [0  0.25 of total duration] Displacement : 0  25 units Segment Ranges : 0 and 0.5. Segment 2: Machine angle: 90  360º [0.75  1.0 of total duration] Displacement : 75  100 units Segment Ranges = 0.5 and 1. Characteristics Values of Asymmetrical MotionLaw. Velocity : No Change to Symmetrical MotionLaw. Acceleration: Segment 1 : Cas = Ca / 2λ ; Acceleration: Segment 2 : Cas = Ca / 2(1λ) 